package cn.edu.ctbu.ap01.api;


import cn.edu.ctbu.ap01.constant.REnum;
import cn.edu.ctbu.dp01.entity.Student;
import cn.edu.ctbu.ap01.exception.RException;
import cn.edu.ctbu.ap01.service.StudentService;
import cn.edu.ctbu.ap01.until.RUtil;
import cn.edu.ctbu.ap01.vo.QueryObj;
import cn.edu.ctbu.ap01.vo.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.*;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/api/student")
public class StudentApiController {

    @Autowired
    private StudentService studentService;


    @GetMapping("/list")
    public R<List<Student>> findAll() {

        /*
        List<Student> students =  studentService.getAll();
        return students;
        */

        return RUtil.success(studentService.getAll());
    }

    @GetMapping("/{id}")
    public R<Student> findById(@PathVariable int id) {


        return RUtil.success(studentService.findById(id));


    }

    @PostMapping("/add")
    public R<Student> add(Student student) {

        return RUtil.success(studentService.add(student));

    }

    @PutMapping("/update")
    public R<Student> update(Student student) {

        return RUtil.success(studentService.update(student));

    }

    @DeleteMapping("/delete/{id}")
    public R delete(@PathVariable Integer id) {

        studentService.delete(id);
        return RUtil.success();

    }

    @GetMapping("/get/{name}")
    public R<List<Student>> inquire(@PathVariable String name) {

        return RUtil.success(studentService.inquire(name));
    }

    @GetMapping("/validateUser")
    public R validateSnoAndPassword(String sno, String password) throws Exception{

        return RUtil.success(studentService.validateSnoAndPassword(sno,password));
    }

    @PostMapping("/getbypage")
    public R<Page<Student>> getByPage(@RequestBody QueryObj<Student> qObj){
        //按id排序
        Sort sort = Sort.by(Sort.Direction.DESC, "id");
        Integer pageIndex = 0;
        Integer pageSize = 10;


        if(qObj == null){
            //student为空就直接调用分页
            Pageable pageable = PageRequest.of(pageIndex, pageSize, sort);
            Page<Student> students = studentService.getAll(pageable);
            return RUtil.success(students.getContent(),students.getTotalElements());
        }else{
            pageIndex = qObj.getPage() - 1;
            pageSize = qObj.getLimit();

            if(qObj.getData() instanceof Student){
                Student student = (Student) qObj.getData();
                Pageable pageable = PageRequest.of(pageIndex, pageSize, sort);


                ExampleMatcher matcher = ExampleMatcher.matching()
                        .withMatcher("name", ExampleMatcher.GenericPropertyMatchers.contains())
                        .withIgnoreNullValues();
                Example<Student> example = Example.of(student, matcher);
                Page<Student> studentsPage = studentService.getAll(example, pageable);
                return RUtil.success(studentsPage.getContent(),studentsPage.getTotalElements());
            }else
                throw new RException(REnum.QUERY_ERR);
        }
    }



}
